Buffer for loom bobbin receivers



July 31, 1945. R. G. TURN ER v BUFFER FOR LOOM BOBBIN RECEIVERS 2 SheetS-Shet 1 Filed Oct. 28, 1943 Fla. 5 V fIlr. '17

FIE. E7

INVENTO H.

E. TURNER, I

RIGHARI ATTORNEY BUFFER FQKLOOM' BOBBIN RECEIVERS Filed Oct; 28, v194:5 2 Sheets-Sheet 2 INVENTOR II II II ll 11) RICHARD G- URNER ATTQRNEY} s \ll'\ 33 51.

v thereof;

Patented July 31, I945 some roa'aoom seams are 1 Rliihitll'tl e. Turner, Worcester, Mam, Crornpton do Knowles Loom a, a corporation ilk-1th worm, Worcester. 7

usetto Applioatlon October 28 1943, serial No. 507,983 I tennis. etire-25s).

This invention relates to improvements in tveft repiehing looms and it is the general object oi the invention to provide an improved bobbin bufler for bobbin cans or receivers. I

in weft replenishing looms it is common practice to employ a bobbin can in front of the lay bobbin receiver and located in the path of the expelled bobbin to direct its path and prevent it from. 8 other bobbins in. the receiver with suficient tone to iniure them.

Bobbins ior welt reple looms are customarily made with a head or butt su rounded with three hardened steel rinse .by me of ,tvhicl'i the bobbin is held in the spring laws of the ehuttle. "These rings project beyond the periphery of the bobbin butt and are sumciently hard to damage bobbin barrels and ierrules on the barrels, as by denting, thus rendering the bobbins or little value for further use with line wait or with electric weft detectors. The rings and butt constitute a heavy part of the bobbin and are projected downwardly with comiderable iorce by the transferrer hammer at the time oi replenishing operation. It is a further object of my invention to provide a ufl'er having a yield- 1'; part lying in the path the outgoing bobbin butt to ensase and retard the latter and also deflect it toward a part of the bobbin can, thereby checking its force, before the bobbin/falls on the other bobbins in the can. In this way dam- T aging contact between the rings or the outgoing bobbin and the bobbins already in the can is avoided.

It is a more particular object of my present invention to provide a bobbin butter having abody grooved to flt'over the beaded edge of a bobbin can and provided with a strip of resilient material, such as leather, which can yield upon impact with the outgoing. bobbin; The buffer can conveniently be made or wood and the groove made in such a way as to tit easily over anupp'er accidental lateral or upward 'fdisplacement Bobbin cans are usually made or resilient sheet material-and it is another obiect of my present invention to or if: use at property at the can mauriai to absorb energy irom the descending bobb The buffer to be described hereinafter is supported on a, wall of the can which lie deflee somewhat upon initial contact be tween the descending bobbin and the er. thereby o the latter as a whole and petits inertia to retard the descending bobbin.

With these and other objects in view which will spar the description proceeds, my invention resides in the combtion and arr ment of pa hereinafter deeoribed i-i eet forth. F in the w L111 l5 venierit embodiment of invention is t i .1 i Fig. 1 is a side elevation oi? e leortl of a Welt 'replenis 1 l, ,1 loom showins a bobbin one provided with my present invention;

Fin. 2 is a rear elevation of the bobbin .1, 1; in the action of arrow l, Fig. i, show the location or improved buffer, Fig. i is an enlarged vertical section on line 3-3 of it she the resilient part oi the butter in normal and deflected positions and also setting iorth the relationship between the her and the needed edse of the one,

his. a is a perspective view of the improved bufier,

Figs. 5 and e are diagrammatic views showing the met in which thebufier can be readily attached to anddetaohed irom the bobbin 'iltn Fig, 'i it an end view or the bufier on an enlaraed scale loo in the direction of arrow l, MI

Fig. 8 shows a bobbin which may be used in a loom provided with invention, and

Fig. 9 is a detailed front elevation of the lay carried chute and the relation which it sustains to my improved butler, looking in the direction of arrow 8. Fig. 1.

Referring particularly to Fig. v1, I have shown a weft replenishing loom ill having a reserve bobbin magazine M provided with a. transierrer arm H operated in the usual manner to insert a treshor reserve bobbin B into .a shuttle S in the shuttle box l! on the lay L under the magazine. The shuttle contains a bobbin B which in the present instance may be assumed to be depleted v or exhausted or weft. A bobbin chute I3 is secured to the lay under box i2 and projects edge of the can and'at the samegtlrne prevent r secured in any approved manner to the loom frame. The can may be made of any approved material, such as inherently resilient sheet metal,

and has an open top surrounded by a bead l5 which may be in the form of a wire or rod around which the upper edge of the sheet metal is wrapped or rolled. The can has outer and inner side walls It and I1, respectively, and has a front wall |8 the upper end of which is formed with a rolled hand hold 20. As shown in Fig. 2 rear wall 2| of the can has a relatively high section 22 at the left and the lower section 23 at the right. The bead |5 extends around recess 24 formed in the rear wall 2| between section 22 and inner wall I1, and has a vertical part 25 at the left of recess '24 as viewed in Fig. 2. The head may also extend upwardly as at 26 on the right side of Fig. 2 along the rear edge of wall H.

The bobbin B may be of any form adaptable .for use in bobbin changing looms, but in Fig. 8

I show a form commonly used in certain types of looms. The bobbin B, illustrated for convenience, has a head 30 surrounded by metal rings 3| to be held by spring clips not shown in the shuttle S. The bobbin i also provided with a barrel 32 a portion of which adjacent the head 30 is surrounded with a metallic ferrule 33". The ferrule is preferably made of thin sheet metal and cooperates with a weft detector D of the elec- 'trical type see Fig. 1. When the ferrule is empty the detector D indicates weft exhaustionin wellknown manner to cause downward movement of the transferrer arm, at which time bobbin B is inserted into the shuttle and bobbin B is forced downwardly through a slot 35 in the, lay along the bobbin chute I3 toward the can. This operation occurs when the lay is on front center position.

that a bobbin would be deflected from it toward the front wall l8 of the bobbin can.

The elongated body 40 is provided with a groove designated generally at 50 to receive the bead I5 extending along the bottom of the recess 24 between parts 25 and 26 .Of the bead. This groove is defined in part by top and rear walls 5| and 52,

I respectively, on the latter of which is formed,

The foregoing is of common construction and except as indicated hereinafter forms no part of my present invention. The bobbins which descend into the can C accumulate at the bottom thereof and if the-rings 3| of a bobbin be- .ing expelled from. theshuttle should strike a ferrule 33 or soft part of bobbin in the can damage of such extent might result as would present an imperfect surface to the weft or detector D and thereby interfere with the correct operation of the loom. It is the general purpose of my invention to provide a buffer which willprevent this damaging engagement between the rings 3| and the bobbins in the can.

In carrying my present invention into effect .I provide a buffer substantially as shown in Fig. 4

having an elongated body 40 provided with a forwardly extending support 4|, the upper surface 42 of which extends downwardly and forwardly.

surface of the buffer is inclined generally in adownwardly and forwardly extending direction so a bottom forwardly projecting rib 53. A second rib 54 extends rearwardly from the front wall 55 of slot 50 on body 40. The upper part 55 of the groove 50 above rib 53, below wall 5|, and between the walls 52 and 55 is so proportioned as to receive the bead l5.

When assembling the buffer on the bobbin can the procedure may be that suggested in Figs. 5. 6 and 3. Fig. 5 suggests that the buffer may be inclined upwardly and forwardly so that the bead I5 will paw between the rib 53 and wall 55. The buffer is then inclined downwardly somewhat so that the bead l5 can slip into the upper end 55 of the groove, see Fig. 6, after which the buffer is released and falls by its own weight to the position shown in Fig. 3. The walls 5| and 52, and rib 53, prevent accidental downward, forward, and upward displacements of the buffer, respectively. The weight of the buffer tends to resist its rearward displacement, and holds wall 52 against bead l5 and rib 54 against the front of rear can wall 2|. The buifer is thus held in operating position on the bobbin can.

In operation, the buffer will normally be in the position and form shown in Fig. 1 and full lines in- Fig. 3 with the rib 54 resting against the rear wall 2| of the can C. 'The buffer 45 will be in the path of the descending bobbin in such a position as to be struck by the butt 35. When the bobbin strikes the resilient buffer strip 45 there will be a slight angular movement of the whole buffer in a counter-clockwisedirection as viewed in Fig. 1 due to the resilience of rear wall 2|. There is thus provided an initial absorption of the energy stored in the descending bobbin due to the inertia of the buffer as a whole. The backward bowing of wall 2| is indicated in dotted lines in Fig. 3. Exertion of further force by the bobbin against strip 45 bends the latter from the full to the dotted line position shown in Fig. 3, after which the bobbin is deflected forwardly against the front wall ll of the can. The bobbin then falls by its own weight'to the bottom of the can or on any bobbins which. may have accumulated in the can from previous replenishing operation withoutdamaging these bobbins. When it is desired to remove the buffer from theca-n it is lifted, pushed rearwardly, and then given a further upward movement in a procedure which is substantially the reverse of that followed when the buffer i applied to the can.

Fromthe foregoing it will be seen that I have provided a simple 'form of buffer readily adaptable to the rear edge of a bobbin can and having a strip of resilient material, such as the leather 45, lying in the path of the bobbin to retard movement of the latter and permit the bobbin to fall easily into the can without damaging other bobbins in the can. The body 40 is of sufficient length to be held more or less in correct lengthwise position with respect to the lay by the vertical' parts 25 and 26 of the bead l5. The buffer is so constructed that the greater part of its weight lies forwardly of the supporting bead l5, and this fact together with the shape of the groove 55 tends to hold the bun'er in correct position during loom operation. When the leather.

strip 45 is relatively thick and offers considerable resistance to bending or deflection it may bend to approximately the dotted line position indicated in Fig. 3, but if the leather strip is relatively flexible it may be bent down to engage the inclined surface 42 of the support 4|. It will also be seen that because of the resilience of the wall 2| of the can the energy of the descending bobbin is absorbed in two stages the first of which is accompanied by a movement of the entire buffer unit and the second of which is accompanied by a deflection of the buffer strip 45 from the full to the dotted line position shown in Fig. 3. The material of which the bobbin can is made therefore contributes partly to the action of the buffer in absorbing energy stored in the descending bobbin and permits the inertia of the buffer unit to retard motion of the buffer.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom having a bobbin can to receive bobbins discharged fromthe loom during a weft replenishing operation, said can having an upper beaded edge, a bobbin buffer comprising a body having walls thereon defining a groove provided with an undercut to receive the beaded edge of the can to prevent accidental upward displacement of the buffer, and a resilient buffer member having portions thereof secured to said body and having other portionsspaced from said body and lying in the path of a bobbin discharged from the loom toward the can to retard movement of the bobbin.

2. In a weft replenishing loom having provision for directing an empty bobbin toward a bobbin can having a bead around an upper edge thereof, a bobbin buffer including a body having a longitudinal slot therein and having a rib on the lower part of the body below said slot for engagement with the can, the slot having a lateral offset on the side of the slot opposite said rib to receive said bead, and a resilient member fastened to the body and having a portion lying in the path of the discharged bobbin to retard movement thereof.

3. In a weft replenishing loom having provision for discharging an empty bobbin toward a bobbin can the rear wall of which has a rearwardly extending bead, a buffer body provided with a longitudinal groove having an offset to receive said bead, said body having a portion thereof below said offset engaging said rear Wall and said body extending into the can so that the weight thereof tends to hold said offset around said bead, and a buffer member on said body lying in the path of the discharged bobbin to retard movement of the latter.

4. In a weft replenishing loom having provision for discharging an empty bobbin toward a bobbin can, said can having a resilient wall, a buffer member supported on said wall in the path of a discharged bobbin, and a resilient member on said buffer positioned for engagement with the discharged bobbin, said wall holding said buffer and resilient member in normal position but yielding due to the resilience thereof upon impact of a discharged bobbin with said resilient member, and said resilient member thereafter yielding, the resilient yielding of said wall and of said resilient member both acting to retard the bobbin.

5. In a weft replenishing loom having provision for discharging an empty bobbin into a bobbin can, said can having a resilient wall, a buffer mounted on said wall and having a body, and a resilient member on said body lying in the path of a discharged bobbin, a discharged bobbin upon impact with the resilient member having the motion thereof subjected to an initial retardation due to deflection of said wall by a force transmitted from the bobbin through the body and said bobbin being subject to a second retardation due to yielding of said resilient member.

6. In a weft replenishing loom having provision for discharging an empty bobbin toward a bobbin can, said can having a resilient rear wall lying in a plane transverse of the path traversed by the discharged bobbin, a buffer having a weighted body supported on said wall and a resilient member on said body, retardation of a discharged bobbin striking said member being due to two factors, one of which is the inertia of said body when the latter moves due to resilience of said wall and the other is the resilience of said member.

7. A bobbin buffer for the discharged bobbin of a weft replenishing loom having a supporting member, said buffer comprising an elongated body having a slot along the rear part thereof to receive said supporting member, and a strip of resilient material secured to said body and extending forwardly therefrom in spaced relation thereto for engagement with a discharged bobbin. 8. A bobbin buffer for the discharged bobbin of a weft replenishing loom having a supporting member, said buffer comprising a body having an elongated slot therein to receive said supporting member, a projection extending forwardly from said body and having a downwardly and forwardly inclined surface, and a strip of resilient material secured to said body and extending forwardly, in front of and under said projection and spaced from said inclined surface,

RICHARD G. TURNER. 

